Ni 含量对SHS 法合成TiC-Ni 基金属陶瓷的影响
INFLUENCE OF Ni CONTENT ON TiC Ni CERMETS BY SHS/PHIP
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摘要: 利用SHS 结合准热等静压(PH IP) 技术制备了TiC-Ni 基金属陶瓷, 理论分析和实验显示, 绝热温度Tad和燃烧温度T c 随Ni 含量的增加而降低, 反应温度影响产物的组织形貌,Ni 含量的增加使合成的TiC 颗粒尺寸变小, 并且逐渐趋向于规则的球形。最后的产物均由TiC 和Ni 两相组成。产物的致密度随Ni 含量的增加逐渐提高, 硬度值随Ni 含量的变化而变化, 两种因素的作用使硬度值在Ni 含量为20% 时达到最大。Abstract: Densified TiC-Ni cermets were produced by SHS/PHIP. Theoretical analysis and experiments show that T ad and T c decrease with Ni increasing, combustion temperature influences the morphology of the products, and TiC particles become smaller and tend to be regular sphere when Ni content is increased. The products consist of TiC phase and Ni binder. Relative density gets higher with the increase of Ni content. Two factors determine the value of products hardness, and a maximum value of HRA appears at 20 wt% Ni.